.box{
    width: 100%;
    height: 100%;
}
.box footer{
    width: 100%;
    height: 50px;
    background: rgb(238, 145, 145);
    position: fixed;
    left: 0;
    top: 616px;
}
.box footer a{
    margin-left: 16%;
    line-height: 50px;
}
.active{
    color: darkgreen;
}